/ Dictionary / Index S Stygian: Meaning and Definition of Find definitions for: Styg•i•an Pronunciation: (stij'ē-un), [key] — adj. of or pertaining to the river Styx or to Hades. dark or gloomy. infernal; hellish. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: stygian (Thesaurus) sty stylar Related Content Daily Word Quiz: endear Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language